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Finding the Fourth Proportional to 70,608.04, 105,912.92 and 20,689.14

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Solution

The fourth proportional to 70,608.04, 105,912.92 and 20,689.14 is: 31,033.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,608.04 : 105,912.92 = 20,689.14 : x
  2. Step 2: Convert to fraction form
    70,608.04/105,912.92 = 20,689.14/x
  3. Step 3: Cross multiply
    70,608.04x = 105,912.92 × 20,689.14
  4. Step 4: Simplify right side
    70,608.04x = 2,191,247,126.24
  5. Step 5: Solve for x
    x = 2,191,247,126.24/70,608.04
  6. Step 6: Final answer
    x = 31,033.96

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.